INDEX 



Adhesive glands, 62, 165. 

 Afferent branchial vessels, 153-155. 

 Amphioxus, isolation of blastomere, 

 127, 131. 



isolation of one-fourth and one- 

 eighth blastomeres, 133. 

 Anus, 60, 62. 



beginning of, 136-139. 



of Urodela, 139, 140. 

 Aorta, early stage, 153. 

 Aortic bulb, 153. 

 Archenteron, 66-68, 70. 



of spina bifida, 77. 



of heuiienibryo, 108, 109. 



posterior pocket of, 136-140. 



enlargement of, 140-143. 

 Ascidians, half-development, 127. 



isolation of blastomere, 131. 

 Assheton, formation of archenteron, 

 70. 



ciliation of embryo, 165. 

 Auditory nerve, 164. 

 Auricle of heart, 153. 

 Axis, primary, 81. 



secondary, 82. 



tertiary, 82. 



von Baer, account of cleavage, 48. 



Barock segmentation, 29. 



Bellonci, direct division of germ-cells, 



12. 

 Bergmann, account of cleavage, 49. 

 Bernard and Bratuschek, 20. 

 Blastomeres, injury to, 106-122. 

 Blastopore, 50-57. 



overgrowth of, 50-57, 68. 



injury to, 79. 



position of dorsal lip, 88. 



in compressed egg, 98-101. 



closure of, 137-140. 



of Urodela, 139, 140. 

 Blastula, double, 118. 



Blood-corpuscles, 155. 

 Body-cavity, 148. 

 Bombinator, pronephros of, 158. 

 Born, cross-fertilization, 26-28. 



sperm-fluid, 29. 



experiments, 90-92. 



compression of egg, 95-99. 



conclusions from compressed egg, 

 102. 



cleavage-plane and embryo-axis, 

 108. 

 Boveri, second maturation-division, 8, 

 9. 



egg-fragments, 30, 31. 

 Brain-vesicles, 62. 

 Branchial arches, 145. 

 Branchial vessel, 153, 154. 



development of, 155. 

 Brauer, second maturation-division, 8, 



9. 

 Bufo, fertilization of egg, 22. 



vulgaris, cross-fertilization, 26-28. 



communis, cross-fertilization, 28. 



Cardinal veins, 153, 157. 

 jjCellulation of yolk, hemiembryo, 110. 

 Centrifugal force, effect of, 92-94. 

 Centrifugal machine, 92-94. 

 Cerebellum, 160. 

 Cerebral hemispheres, 160. 

 Chabry, 127. 

 Chun, 127. 



Cilia, on surface, 165. 

 Cleavage, 32-41. 



of compressed egg, 96-101. 

 of egg in centrifugal machine, 92-94. 

 Cleavage-plane, relation to egg-axis, 



82, 85-87. 

 Cloaca, opening of segmental duct into, 



156. 

 Ccelom, 148, 150. 



relation to pronephros, 156. 

 187 



